| British Rail Class 01 |
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| Type and origin |
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| Power type | Diesel-mechanical |
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| Builder | Andrew Barclay Sons & Co. |
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| Serial number | 395–398, 424 |
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| Build date | 1956 (4), 1958 (1) |
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| Total produced | 5 |
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| Specifications |
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Configuration:
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| • Whyte | 0-4-0 |
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| • UIC | B |
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| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
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| Wheel diameter | 3 ft 2 in (0.965 m) |
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| Minimum curve | 1.06 chains (21 m) |
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| Wheelbase | 6 ft 0 in (1.83 m) |
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| Length | 23 ft 8 in (7.21 m) |
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| Width | 8 ft 5+1⁄2 in (2.578 m) |
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| Height | 11 ft 10+1⁄2 in (3.620 m) |
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| Loco weight | 25 long tons (25 t) |
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| Fuel capacity | 325 imp gal (1,480 L; 390 US gal) |
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| Prime mover | Gardner 6L3 |
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| RPM range | 1,200 (max) |
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| Engine type | Four-stroke diesel |
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| Transmission | Mechanical: Wilson SE4, 4-speed epicyclic gear box, Vulcan-Sinclair type 23 rigid hydraulic coupling, to a Wiseman 15LGB reverse and final drive unit. |
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| Loco brake | Straight Air |
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| Train brakes | 11503–11506: none 18: Vaucuum |
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| Performance figures |
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| Top speed | 14.5 mph (23.3 km/h) |
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| Power output | Engine: 153 hp (114 kW) At rail: 102 hp (76 kW) |
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| Tractive effort | 12,750 lbf (56.7 kN) (max) |
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| Brakeforce | 15 long tons-force (150 kN) |
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| Career |
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| Railroad(s) | British Railways |
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| Number | 11503–11506, 81 (departmental); later D2953–D2956; later 01001–01002 |
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| Axle load class | RA 1 |
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| Retired | 1966–1981 |
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British Rail's Class 01 diesel locomotives were a short wheelbase 0-4-0 diesel-mechanical design intended for use in areas with tight curves and limited clearance.
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| Diesel shunters: | |
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Diesel shunters (pre-TOPS): | |
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| Main-line diesels: | |
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Main-line diesels (pre-TOPS): | |
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| Electrics: | |
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Electrics (pre-TOPS): | |
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| Departmental: | |
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| Prototypes: | |
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